pinctrl: pinctrl-mxs: Take care of frees if the kzalloc fails

if there is no purecfg , the group pointer is allocated using kzalloc and if it
fails to allocate, we wont free the new_map,

if config is true, we call kmemdup and if it
fails to do so we wont free the allocated group if there is no purecfg.

fix this by doing the frees of new_map pointer and group pointers.

Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/pinctrl-mxs.c b/drivers/pinctrl/pinctrl-mxs.c
index 556e45a213eb1997f0ce351e884f4bf958dbe3cf..9d46303a84e76d4dc8c6606a54a086a40c85aca2 100644 (file)
--- a/drivers/pinctrl/pinctrl-mxs.c
+++ b/drivers/pinctrl/pinctrl-mxs.c
@@ -107,8 +107,10 @@ static int mxs_dt_node_to_map(struct pinctrl_dev *pctldev,
 
                /* Compose group name */
                group = kzalloc(length, GFP_KERNEL);
-               if (!group)
-                       return -ENOMEM;
+               if (!group) {
+                       ret = -ENOMEM;
+                       goto free;
+               }
                snprintf(group, length, "%s.%d", np->name, reg);
                new_map[i].data.mux.group = group;
                i++;
@@ -118,7 +120,7 @@ static int mxs_dt_node_to_map(struct pinctrl_dev *pctldev,
                pconfig = kmemdup(&config, sizeof(config), GFP_KERNEL);
                if (!pconfig) {
                        ret = -ENOMEM;
-                       goto free;
+                       goto free_group;
                }
 
                new_map[i].type = PIN_MAP_TYPE_CONFIGS_GROUP;
@@ -133,6 +135,9 @@ static int mxs_dt_node_to_map(struct pinctrl_dev *pctldev,
 
        return 0;
 
+free_group:
+       if (!purecfg)
+               free(group);
 free:
        kfree(new_map);
        return ret;